Facing machine



Aug. 13, 1929- J. L. BERNARD FACING MACHINE Filed June 23, 1927 2 Sheets-Sheet Ia'i'awsses:

Aug. 13, 1929. Y BERNARD 1,723,999

FAG ING MACHIN E Filed June 25, 192'? 2 Sheets-Sheet 2 )Vc'inesses: believe/for:

% M 2 if 1 W5 A gem/7m Patented Aug. 13, 1929.

UNITED- STATES JAMES L. BERNARD, OF BEAVER, PENNSYLVANIA.

FACING IVIAGHINE.

Application filed .Tune 23, 1927. Serial No. 200,895.

This invention relates to facing machines and, more particularly, to rotary facing 1na chinesfor facing the ends of built-up or solid columns and beams, castings, and other similar work.

The object of this invention is to provide a machine of the class described having two cutting head's, one mounted within the other. whereby the cutting heads may beof greater diameter than when a single head is used and such heads may be operated at a greater speed, therefore, permittingtheir use on larger sized work-pieces and also increasing the ca pacity of the machine.

Another object is to provide a machine in which the cutter-heads areoperated in opposite: directions so as to neutralize the thrust of the heads to a large extent and thus prevent excessive strains on the machine.

A further object is to provide a machine of theclass described, having the novel construction, design, and combination of parts hereinafter described.

In the drawings- Figure 1 is a. longitudinal sectional elevation througha machine constructed in accordance with this invention.

Figure 2 is a fragmentary sectional plan showing the drive-shaft and its mounting.

Figure 3, is a transverse section taken on the line TIL-III of Figure 1.

Figure 4: is a forward end elevation of the machine. 1

Referring more particularly to the drawings, the numeral 2 designates the bed of the machine on which a carriage 3 is slidahly mounted. An adjusting screw-shaft 4: is journaled in hearings on the bed 2 and has a threaded engagement with a threaded sleeve .6 secured on the carriage 3. The screw-shaft 4 is adapted to. be either manually or power operated, and rotation of the sh aft will cause the carriage 3 to move relative to the bed 2.

A ring-shaped outer cutter-head 6, having a hollow sleeve-like stem or shaft portion 7 is journal ed in bearing portions 8 and 8 of the carriage 3. A second or inner disk-shaped cutter-head 9 is mounted within the cutterhead 6 and secured on the end of a cuttershaft 10 which is journaled in the shaft portion 7 of the cutter-heads 6 and has its rear end journaled in a bearing portion 12 of the carriage. An anti-friction bearing 13 is mounted between the cutter-heads 6 and 9.

drive-shaft 25.

The shaft 10 has a gear 27 slidably keyed thereon so as to permit the shaft to move longitudinally relative to the gear. The gear 27 is meshed with an idler pinion 28, which pinion is in turn meshed with a drive pinion 29 on the drive-shaft 25. By use of the intermediate or idler pinion the shaft 10 is compelled to travel in the same direction as the driveshaft.

The sleeve or hollow shaft portion 7 of the cutter-head 6 has a gear 30 slidably keyed thereon so as to permit the shaft or sleeve 7 to move longitudinally relative to the gear. The gear 30 is meshed with a pinion 31 on the It will he noted that by meshing the gear 30 direct with the pinion 31 on the di'.'ive-shaft 25 the gear 30 and shaft or sleeve 7 will be rotated in a direction opposite to the direction of rotation of the shaft 10 and drive-shaft 25. The cutter-heads 6 and 9 are directly connected to the shafts 7 and 10. respectively, and, therefore, said heads will be rotated in opposite directions. By rotating the heads 6 and 9 in opposite direc tions the thrust of the heads, due to the cutting action of their hits or tools, will be neutralized to a large extent.

The gearing connecting the drive-shaft 25 with each of the cutter-head shafts 7 and 10 is so proportioned that the outer periphery of the larger or ringshaped cutter-head 6 and the outer periphery of the smaller or. diskshaped cutter-head 9 will have approximate ly the same speed in feet per minute. In other words, the cutter-head 6 will make approximately one-half the revolutions per minute that is made by the cutter-head 9, and the head 6, being twice the diameter of the head 9, the velocity in feetper minute of the circumference of the two heads will be approximately the same.

In order to feed or move the cutter-heads 6 and 9 toward and away from the workpiece which is adapted to be positioned on the table portion 35 of the machine bed 2, I have provided a fluid pressure cylinder 36 which has its plunger 37 connected to the rear end of the shaft 10 by a coupling 38. An antifriction bearing 38 is mounted between the plunger 37 and rear end of the shaft 10 to re duce the friction caused by the shaft 10 rotating relative to the plunger 37.

The shaft 10 is provided with a collar 39 which is keyed thereon and is backed up by a nut 40, and anti-friction bearing ll is positioned between the collar 39 and the rear end of the shaft 7, so as to form a feed connection between the shafts 10 and 7 and cause both of said shafts to feed toward the work simultaneously when the plunger 37 of the cylinder 36 is extended. When the plunger 37 is retracted, the head 9 will bear against the web of the head 6 and force the head 6 and shaft 7 to move rearwardly.

In operation the work-piece will be preferably offset with respect to the center of the heads 6 and 9 so as to cause the even machining of the entire surface of the work-piece and prevent the forming of a dead center or unmachined point.

l/Vhile I have shown and described one specific embodiment of my invention it will be understood that I do not wish to be limited thereto since various modifications may be readily made without departing from the scope of my invention as defined in the appended claims.

I claim 1. A facing machine comprising a carriage, a pair of rotary cutter-heads mounted on said carriage, one of said cutter-heads being mounted Within the other, both of said cutter-heads having their cutting faces in the same plane, and individual drive mechanisms, for said cutter-heads, said mechanisms being arranged to drive said heads so that the outer peripheries of said heads will have approximately the same speed in feet per minute.

2. A facing machine comprising a carriage, a pair of rotary cutter-heads mounted on said carriage, one of said cutter-heads being mounted within the other, both of said cutterheads having their cutting faces in the same plane, and individual drive mechanisms for said cutter-heads, said mechanisms be ing arranged to drive said heads in opposite directions and at a speed differential so that the outerperipheries of said heads will have approximately the same speed in feet per minute. I

3. A facing machine comprising a carriage, a pair of rotary cutter-heads mounted on said carriage, one of said cutter-heads being mounted within the other, both of said cutter-heads having their cutting faces in the same plane, individual drive mechanisms for said cutter-heads adapted to drive said heads in opposite directions, and a single source of power carried by said carriage for operating said individual drive inechanisms.

l. A facing machine comprising a carriage, a pair of rotary cutter-heads mounted on said carriage, one of said cutter-heads being mounted within the other, both of said cutterheads having their cutting faces in the same plane, individual drive mechanisms for said cutter-heads adapted to drive said heads in opposite directions, and at a speed differential so that the outer peripheries of said heads will have approximately the same speed in feet per minute, and a single source of power carried by said carriage for operating said individual drive mechanisms.

5. A facing machine comprising a carriage, a pair of rotary cutter-heads mounted on said carriage, one of said cutter-heads being mounted within the other, both of said cutter-heads having their cutting faces in the same plane, means for simultaneously feeding said cutter-heads against the work-face, individual. drive mechanisms for said cutterheads adapted to drive said heads in opposite directions and at a speed differential so that the outer peripheries of said heads will have approximately the same speed in feet per minute, and a single source of power carried by said carriage for operating said individual drive mechanisms.

6. A facing machine for facing the ends of built-up and solid columns and the like, comprising a carriage, a hollow shaft journaled in said carriage, an outer ring-shaped cutterhead on the forward end of said shaft, a second shaft journaled within said hollow shaft, a disk-shaped cutter-head on the forward end of said last named shaft and fitted within said ring-shaped cutter-head, means for preventing longitudinal movement of said shafts relative to each other, power means connected to said second named shaft and adapted to reciprocate both of said shafts. a motor carried by said carriage, a drive-shaft journaled on said carriage drive means connecting said motor and said drive-shaft, and individual. trains of gearing connecting said first and second named shafts with said driveshaft.

7. A facing machine for facing the ends of builtup and solid columns and the like. comprising a carriage. a hollow shaft iournaled in said carriage, an outer ring-shaped cutterhead on the-forward end of said shaft. a second shaft journaled within said hollow shaft. a disk-shaped cutter-head on the forward end of said last named shaft and fitted within said ring-shaped cutter-head. means for preventing longitudinal movement of said shafts relative to each other, power means connected to said second named shaft and adapted to reciprocate both of said shafts, a

motor carried by said carriage, a drive-shaft ournaled on said carriage, drive means eonneeting said motor and said dr1ve-shaft, and

9 individual trains of gearing connecting said first and second named shafts Within said drive-shaft, said indivldual trams of gearing belng arranged to drive said shafts and cutter-heads in opposite directions and at a speed differential so that the outer peripheries of said cutter-heads Will have approXi- 10 niately the same speed in feet per minute.

In testimony whereof I have hereunto signed my name.

JAMES L. BERNARD. 

